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Advanced Oxidation Process (AOP)

Advanced oxidation processes (AOPs) use hydroxyl radicals (OH) to oxidize organic (and occasionally inorganic) compounds in water and wastewater. Toxic, recalcitrant and refractory COD generated from Aromatics, pesticides, petroleum components, and volatile organic compounds are examples of biologically harmful or non-degradable elements. These can be removed from wastewater using the AOP technique.
AOPs can also be used to treat the effluent of secondary treated wastewater, a process known as tertiary treatment. Contaminant elements are mostly transformed to stable inorganic compounds such water, carbon dioxide, and salts, which is known as mineralization. The reduction of chemical contaminants and toxicity to the point where the cleaned wastewater can be recycled in process or sent out to CETP
Application:

Advanced oxidation processes (AOP) are a type of chemical treatment that oxidises organic molecules in wastewater that are difficult to manage biologically and converts them to simple final products.

Features and Advantages:

AOPs hold several advantages in the field of water treatment:

  1. They can effectively eliminate organic compounds in aqueous phase, rather than collecting or transferring pollutants into another phase.
  2. Due to the reactivity of ·OH, it reacts with many aqueous pollutants without discriminating. AOPs are therefore applicable in many, if not all, scenarios where many organic contaminants must be removed at the same time.
  3. Some heavy metals can also be removed in forms of precipitated M(OH)x
  4. In some AOPs designs, disinfection can also be achieved, which makes these AOPs an integrated solution to some water quality problems.
  5. Since the complete reduction product of ·OH is H2O, AOPs do not introduce any new hazardous substances into the water